Spring winding machine



P. M. sAMPATAcos E1- AL 2,788,807

April 16, 1957 SPRING WINDING MACHINE Fned April 2. 1951 6 Sheets-Sheet l ATTORNEY April 16, 1957 Filed April 2 1951 P. M. SAMPATACOS ETAL SPRING WINDING MACHINEv 6 Sheets-Sheet 2 /NvE/vro/Ps PETER M. SAM/Aucas EDWARD E. FRAN/rs JR.

Arromvfy April 16, 1957 P. M. sAMPATAcos :s1-AL 2,788,807

SPRING WINDING MACHINE:

Filed April 2, 1951 6 Sheets-Sheet v /NVENTORS PETERMSAMPATACOS EDWARD E FRAN/(SJR.

A rop/vir April 16, 1957 Filed April 2, 1951 P. M. SAMPATACOS ETAL SPRING WINDINC MACHINE 6 Sheets-Sheet 4 /NvE/'vrons Perf/2 M. sAMPATAcos EDWARD e. FRAN/rs Jn.

ATTORNEY April 16, 1957 P. M. sAMPATAcos ETAL SPRING WINDING MACHINE 6 Sheets-Sheeb Filed April 2, 1951 wauw.

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/NvE/vToR PETERMSAMPA rAcos Arron/var wmwmmm EDWARD L'. FRAN/(S JRJ'y By *UM NMRS @NYH uH/ www w NQ www,

y April 16, 1957 P. M. sAMPATAcos ETAL 2,788,307

' SPRING WINDING MACHINE Filed April 2 1951 l 6 Sheets-Sheet 6 F/G. /4 w .Tw w A 5 /NvENToRs /Lf PETER M SAM/Aucas EDWARD E. .FRAN/r5.1@

l /Ma/ ay 47 A T TORNEV United States Patent ansa-,sav

SPRBNGV WINDEIG, MACHINE Peter M; Sampatacos, Torrington, and'Etwai'd'EQ.Fi'aiiiis,A

Jr.,V Litchfield; Conn., assigjnors to TheV Torrington Manufacturing'Company, Torrington, Conn., a corpuration ofl Connecticut Application April 2r1951 Serial-No. 218,792v

4 Claims. (Cl. 149-82) of the features disclosedV in our copendingapplication for Spring Winding- Machine, Serial No. 2l8,791, liled on-evemdateherewith, now Patent No. 2,697,470, dated September 214, i954.

One object ot' the invention is to provide a machine of'thev segment type having'` a clutchV and`a brake, more particularly an electromagnetic cititch and an electromagnetic brake, for driving and stopping the spindle and including means for disengagingthe brake and engaging the clutch to eiect rotationof theY arbor carrying spindle in the winding direction duringthe entire movement of the segment in one direction and for disengaging the clutch and engaging' the brakeV dining movement of. the segment in the reverse direction so as to stop the spindle when it hasrotated in the reverse direction at least approximately to its starting position.

Another object of'the invention is to provide a machine having the. characteristics last above-statedv and also havingadditional meansrfor accurately locating the spindle in its startingposition `at the beginning of each rotation thereof in the winding direction.

Another object of the invention is to provide a nia-- chine of the type specied having two spindles and/having a clutch and a brake for each spindle operable asf above stated.

Another object of the invention is to provide amachine ofthe type speciedhaving two spindles and aclutch and a brake foreach of them,rand also having means; for so operating the clutches and.' brakes that the spindles are operable alternately, each.spindle being idle whileftheV other is operating.

Another object of the invention is to provide a machine of Vthe type speciedhaving two spindles. and a clutch and a brake for each of them and constructed and arranged so that the spindles can be operated in unison or can be operated alternately asabove stated.

Other objects of the invention are to provideV variousdetails of mechanical structure and of'electrical arrangement whereby the foregoing more general objects are attained.

Still other objects of the invention will beiapparent from the drawings and from.the following description and claims.

In the drawings we have shown in detail a preferred embodiment of, the-invention, but it will be understood that various changes may be made from the construction.

shown, and that the drawingsare not toV be construed as definingV or limitingthe scope of the invention, the claims forming a part of this specification being reliedupon for that purpose.

The in '2,788,807 Paianfed'f Apr.. te; i951? ing Vthe spring' after it liasjbeen'woundi Fig. 4'is a front view. Y

Fig, 5 is an-enlargedigenerally verticalisectional'View.. taken alongthe line 5'5/ofF.`i`g.t 4; withthe. gear segment in its centralV position.

Fig 6' isa. developedsectionall view, takemalongttle; line 6-6 of Fig. 4. Y

Fig. 7 i'sanenlargedfragmentary verticaLsectionaLview. taken along the line,7'-7 of'Fig., 4.

Fig. 8' isan end'view of theV parts showninlig. .7, ,on a. rear View. of the same partsasshown in thellower left". corner of Fig. 4.'

Fig. 9Jis ahorizontal Vsectional view? taken. along-the: liney 9'-9 of'Fig. 7.

Fig. 10 isanenlarged.fragmentarg'verticaltsectional view taken along` theJine, .10.-10L0f Eig..3.

Fig. 1ljis.anenlargedfragnientary fronttview. ofsome of theY parts, directlyv associa'tedlwithihe, spindle.

Fig. l2 is a view` showing in .dilerentfpositions some of the parts shownin lig.v 1l..

Fig. 13fis adiagram showing` the electricahcontroljon the machine.

Figs. 14 to 1.8 are .schematic views,illustratingthefmovee ments of some. of the partsv ofthemachine;

A machine, embodying. the inventiommaybe'used fon coilingfor winding springs of various types; O neorm-.o spring that may` be woundiisshown in Eig. 2f of the; drawings, this springhavingtwmsimilar coils.I Thespringj as shown inFig. 2V istobe regarded as,merely-ill1.1strative,` the invention not being limited-to machines; for ceiling orfwinding Suche. spring; Themachine'is showninparti ularly adapted'for thewindingon ceiling offpieces; or;V lengths ofwire which .are cut; and whichfmay bepartly; formed before beingsuppled to the machine; However;` theinvention isnot limitedtofamachineA forpthe; coiling: or Winding of previously cut andformedlengthsof-gwire:

Fig. lshows a wire lbent to the-shapeaingwhich-it=-is supplied. to. the machine. in` orderl to producethe springt shown in Fig., 2. The ywire 10.basan;generally;4 hairpin shape, with two side portions; 12,12 and-a transversalcon:` nection portion. i4. The wire ltlis shown as engaged with-i a dog 16 having splined engagement withi a rotatable arborlS carn'edby the rotatable spindlefofz the:.machii1e. The dog 16 is freely engageablefwith or: disngageable from Vthe arbor- 13- by'endwiseV movement andfthe spliningf is such that the dog can. be engagedY inA onlyxonee posi; tion. The side portions 12,- 12 of-the wirev arefengaged: with a stationary. studv 20topreventrot-ation; As. shown. in Fig. 6, the stud20 .is a-composite.structurefcomprisingf a central bolt and a.sleevesurroundingithe.bolnfthe sleeve: being omitted from `the schematioFigs. and'x 2;. Byrthe. action of-:the machine the `sideportions*12,.lrofithewviret are coiledor wound'on the arbor to produce..coilsi22;l22t as shown in Fig.,2. The'arborlS andfthefdogdt.'collec; tively. constitutemeans carried by the;spindlezfrsengaging:. a wire-to` elect winding thereofrtoform'axsprngz.,

M achzne as shown ifi Figuesio 1,2..

The machine comprises a main frame "forgcarryinggort supportingallof thel operativeiparts'oth'er tl'rarrsomeppr: tions: ofv theY electrical equipment"which may'besep'al rately supported as hereinafter explained. The frame of the machine comprisesvertical front and rear plates 24 and V26 which are connected near the corners thereof by meansftransverse angle bars 28, 28. The angle bars may be secured to the plates by means of bolts 30, 30. A cover 32 is provided which extends between the front and rear platesat thetop and end edges thereof, the cover enclosing the Vspace between the plates. The front and rear plates and the parts carried -therebyare supported uponahorizontal base 34. j Y

i" Supported in suitable bearings carried by the front and rear frame plates isa transverse main drive shaft 36. Secured to the-shaft 36 betweenY the front and rear plates anjd near thegrear plate is a'sprocket wheel 38. An endl'ess drive chain 40 passesaround the sprocket wheel 38 and also around a sprocket wheel;atv42, the chain extending through an opening in the right4 portion of the ever 32. sprocket wheel42 is driven by a motor 44 which is shown only in the wiring diagram in Fig. 13. An adjustable change speed mechanism may be interposed between the motor '44 and the'sprocket wheel 42. t

As ,shown invFig. 5, abearingY supporting stud 46 is mounted inablock 48 carried by the rear frame plate 26, this stud,projectingforwardly. A large bull gear 50 is rotatablymountedoon the stud 46 by means of a bearing 572'.Y The bull gear 50 meshes with a pinion 54 on the drive shaft 36, as shown Vin Fig 4, the said gear 50 being continuously rotated in the counterclockwise direction when the drive shaftis rotated. Y j

--eSu'pported in Ysuitable bearings carried bythe front and rear plates 24%and 26'and near the bottoms thereof is a transverse rockshaft 56.l Secured to the Vrockshaft is an arm 58 whichV carries a gear segment'60,fthe gear segment being concentric with the axis of the roclsshaft.

' Secured to the front face of the bull gear 50 are two parallel guides spaced equally from a radial plane/through the center of the gear. One of the said guides is shown at 62 in Fig. 5. A block 64 tits between vthe guides and is adjustable radially along the face of the gear 50. A manually rotatable screw 66 carried by the gear serves to radially adjust the block 64 and to hold it in adjusted position. The arm 58 has a radial slot 68 therein, and a roller 70 carried by the block 64 fits the said slot 68. It will be understood that when the gear 50 is rotated, the roller 70 moves in the slot 68 to oscillate the arm 58 and the gear segment 60. The extent of oscillation can be changed by changing the distance of the roller 70 from the axis of rotation. For the particular setting illustrated, the

the beforernentioned stud 20. The stud is carried by a; bracket 93 and is adjacent the upper end thereof. The

bracket 93 is held in place by bolts 94 and 95 which engage the front frame member 24. `Therbracket preferably has an arcuate slot for receiving the lowerbolt 95, the bracket being thus adjustable about the axis of the upper bolt 94.

gear segment is movable as shown in Fig. 4 from an ex treme left position as indicated at 60a to an extreme iight position as indicated at 60h.

An intermediate shaft 72 is supported in suitable bearings carried by the respective front and rear plates 24 and 26. Secured to the shaft 72 is a gear 74 which meshes with the gear segment 60. As the gear segment is oscillated the gear 74 and the shaft 72 are rotated successively in opposite directions. Y

At least one transverse horizontal spindle isY provided which is rotated by the intermediate shaft 72. Preferably, there are two suchA spindles 76 land 78 widely spaced horizontally and located near the respective ends of the machine., As clearly shown in Fig. 6, theV left spindle 76 is supported'at .the front by a bearing mounted in a bearing block 80 carried by the front frame plate 24. At the rear of the spindle 76 and in alignment therewith is a short spindle drive. shaft 82 supported on therearV frame plate 26'by a bearing 84. The drive shaft 82 has a flange 86 at its front end and said drive shaft is centrally recessed to receive the rear end portion'of the spindle. The spindle issupported at the rear by a bearing 88 within said recess in the drive shaft 82, it nbeing clearthat the drive shaft is rotatable independently of the spindle. Y

The spindle 76 projects at the front beyond the front plate 24` andbeyond the bearing block 80 `and it has a tapered opening for receiving a driving member for the arbor.1 8.which member may be a chuck having a flange A A ...y

The right Spindle 7s is similar to the left spindle 76 aad is similarly mounted, except that it is reversed in position. Itis provided at the rear with a chuck which is similar to thatV for the spindle 76 and which is similarly connected. A stud 20 is provided which is similar to that at the front and which is similarly mounted. There is a drive shaft 96 for said spindle 78 at the'front thereof, this drive shaft being similar to the drive shaft 82 for the spindle 76.

Located between the intermediate shaft 72 and the spindle 76 is a transverse horizontal shaft 98 supported by suitable bearings carried by the front and rear frame plates.` Gears 100 and 102 are secured respectively to the intermediate shaftv 72 and to the shaft )8.A An idler gear 104 is provided which meshes withthe said gears 100 and I zrthe idler gear being rotatable on a stud 106 carried by the rear frame plate 26. The shaft 98 projects beyond the rear plate 26 and the spindle drive shaft 82. similarly projects beyond said rear plate. vMeshing *gearsV 108 Iand 110 `are secured respectively to the projecting portions of the shafts 98 and 82. The gears 108 and 110 are yreadily removable and other gears may be substituted to provide a different speed ratio between said shafts. A

removable cover, not shown, may be provided for theV gears 108 and 110. By means of the described gearing the spindle drive shaft 82 is rotated successively Yin opposite directions, the successive directions of rotation beingV opposite those of the intermediate shaft 72.

Located between the intermediate shaft 72 and the spindle 78 is a transverse horizontal shaft 112 similar to the shaft 98 and similarly supported by suitable bearings carried by the front and rear frame plates. A gear 114 is secured to the shaft 112, this gear meshing with the aforesaid gear 100 on the intermediate shaft 72. The shaft 112 projects beyond the front plate 24 and the spindle drive shaft 96 similarly projects beyond said front plate. Meshing gears 116 and 118 similar to the gears 108 and 110 4are secured respectively to the projecting portions of*v the shafts 112 and 96. The gears 116 yand 118 are readily removable and other gears may be substituted to provide adiiferent speed ratio between the shafts 112 and 96. The speed ratio between the shafts 112 and 96 is ordinarily exactly the same as the speed ratio between the shafts 98 Iand 82. A removable cover, not shown, may also be pro? Y vided for the gears 116 and 118. By means Gf the described gearing the spindle drive shaft 96 is rotated suc.

:cessively in opposite directions, the successive directions of rotation being the same as those ofthe intermediate,

shaft 72 and opposite those of the spindle 'drive shaft 82.

As shown in Fig. 6, a clutch 120 is'provided by means of which the spindle drive shaft 82 may be connected' with or disconnected from the spindle 76.V The clutch s preferably of the electromagnetic type and it is adapte to be engaged and disengaged by means including electric circuits and switches as hereinafter explained in detail. VAny suitable electromagnetic clutch may be used and the clutch and its associated parts as shown are intendedrto be merely illustrative. a rotatable cylindrical member 122 which is rigidly connected with the spindle by means of a' spindle driving The clutch 120 includes i grasso?v disc,12w4. T115, cylindrical member IZZcarriesan annular magnet coil 126. Thecoil isfconnecteclin anielectric. circuit bymeans ofslip rngs 128, 12S and by meansV of stationary brushes 130,136, the brushes being carried by aibracket 132 on the cover plate 32. The clutch 120includes a rotatableV armature4 134which is connected with the spindle drive shaft S2 for rotationin unison therewith.

When the clutch magnet coil 126v energized, the clutch armature 13,4' is movedilongitudinally of thevshaft 82 andjinto frictionalengagementwitli .a friction member adjacent the magnet and 'movable therewith and the spin-V dle 76 is rotated in unison Vwith' the said armature and with the spindle drive shaft. Whenthe magnet coil 126 is de-energized, the amature 134 is released from frictional engagement with the saidmagnet, and the spindle drive shaft 82 Vand the armature 134. are freely rotatable independently ofthe spindle. As will be explained, `the clutch magnet may be'only partly energized.

A brake 136 'is provided, for quickly stopping the rotation' of the spindle 76. When the brake is engaged it serves to prevent rotation `of the spindle. When the brake is disengaged the 'spindleA is free forrotation by the clutch 126. The brake 136 is preferably of the elecf tromagnetic type. Any suitable electromagnetic brake may be used but as shown the brake 136 is similar to the clutch 120. The brake includes a cylindrical member'135 which is nonrotatable and which is preferably rigidly connected'with the-block S6 which su}: p ortsthe front spindle bearing. The cylindrical member 133 carries an annular magnety coil'14ti; The brakel also-includes-a-rotatable armature 142 whichy isconnected to the-spindle for rotation-therewith by means of a disc 144 securedtoithe spindle.

When the brake magnet coil 140 is energizeithebrake armature 142 ismoved longitudinally ofthe spindle'and into-frictional engagement with a nonrotatable friction member adjacent the magnet. The frictional engagement stopsrotationvof the spindle'76 and holds the spindle in a iiXed rotative-position. When the brakemagnet is deenergized, the brake armature is released from frictionai connection with the magnet and the spindle is free so that it can be rotated by the clutch 120; As will be explained, the brakeV magnet 140 may be only partly energized.

A-clutch145 isA provided for driving the spindle 7S, this clutchy being similar to the Vclutch 120'and havinga magnet coil similar to the magnet-coil 126. AV brake 150 islprovided for theV spindle73, this brake-being similar to the-brake 136randfhaving a magnet coil similarV to the 4magnetcoil- 14?.y The clutch 146 andthe brakeit operate in the same manner as described in connection.

with theclutch 1201and` thevbrake 136.

As shown in Figs. 4, 7,V 8 and Qacam operated switch mechanismis'provided; The mechanism includesacamshaft 154i whichris mounted in suitable bearings onthe front and rear frame plates 24 and 26; As shown in Figs. 4- and 5, agear lis-provided which is connected with the bull gear 50. The gear 156 meshes with a gear 158 on thecam shaft 154, said shaft being thusl continuously rotated. The gears 156 and 15S are of the same diameter and it willbe apparent that the cam shaft 154- makesonerevolution during each cycle offoperation.

Secured to the cam shaft 154 areffour cams 160, 162, 164 andf166. Carried by the base 34 isa bracket 16S which-carries four switches 170, 172, 174 and 176 correspondingrespectively to-said four cams. A bracket 177 is-carried by the front frame plate 24, and four pushrods 178, 179, igt? andr181 are mounted in the bracket for vertical movement, thetops of the said push rods beingengageable respectively by the cams 16d, 162, 164'and 166.

The push rod 178 engages ay pivoted lever 1e?. which is biased,upwardly by a spring 183, the lever being oscillated when the rod is reciprocated; The lever 182 engages and operates a control lever 184 on the switch? which is of, the ratchetftype. Asshowmin thesdiagram of electrical connections, the switch-170comprrises Pork convenience. of description the contacts of the two pairs will some-` UponY alter-- nate operatiizmsthev switch 1,7fisA closed andthev switch.` 17?b is, opened and upon intervening operations theswitch,

two pairs of contacts 170?L and 1701.

times be referred to 'as-separate switches.

17in is opened andthe switch 1701 is closed.Y

of. description the contactsofthesaidJpaiiswi-lll sometimes be referredV to as separatey switches. operation the switch 172%1- isfclosed andV the, switch,172b` is simultaneously opened and thereafter the switch 172*al isopencd and the switch 17.2b is simultaneously closed.

Similarly, upon eachV operation'the switch 174a is closed and the switch 174b is simultaneouslyI opened andthereafter the `switch 174a is opened andpthe switch 1714b is simultaneously closed.. The switch.176 hasV only one pair ofv contacts.

The cams 162,164. and 166 are angularly adinstable on the shaft' 154. so as tooperate the switches in the proper timed relationship. The exactshapes andY positions -of'the cams are not .-shown, but the necessary timing will be apparentfrom the description which will be givenV in connection with the electrical Vdiagram in Fig. 13.

As shown in FigS. 3, 6.and 10, a cam operated switch mechanism is provided for each spindle. As shown the spindle 76 carries av cam 11-38,` whichfoperates a pivoted lever 189 on-a bracket 19=secured to the adjacent anglek bar 2S; The bracket 196 carries;afswitch.192,-which.is;

operated when the lever 189 is.moved.by thecam 188.

As shown in the diagram of electrical connectiongthe switch comprisesv two pairs ofy contacts1 192eY and 192i.

For convenience of'description, thecontacts of said: pairsv` Uponwill sometimes be referred to as separate switches. each operation., the switchl92a is opened and-,the switch 192D is simultaneously closed andl thereafterthe switch 192a is closed and the switch 192b is simultaneously.

opened..

The spindle 'iscarries afcarn-191`-rwliichl issimilarto the cam 188, this cam operating a switch 19,4.whichis similar tothe switch 192. As shown-in the diagram-of electrical connections, the switch 194 comprisestwo pairs of contacts194a and 19410. For convenience offdescriptionthe contacts of said pairsV will sometimes-be re-.-

ferred lto as separate switches. Upon `eachoperation the. switch 1.94a is opened and the switch 194b isv simultaneously closed and thereafter theswitch194f is closed and the switch 1Mb` i-ssimultaneously opened.

As shown in Figs. 3, 4, 1l and l2, amechanismvis provided for each-spindle for definitely positioning or.

stopping it in its starting position at the beginning ,of eachL cycle, that is, at thel beginning of each-rotation in the. winding direction. The said mechanism is shown in detail, for the spindle 7e and` it will be understood thatan identical mechanism is provided for thespindle 78.

As previously stated, theV blocks or keys 96` and 9.2 onY the spindle enter slots in the chuck flange 89. As 4more clearly shown in Fig. 1i, the periphery of theA flange 89 is curved inwardly adjacent the `left faces or shoulders-198` and 269 of the blocks so as to providefnotches. A bracket 202 is secured to the front frame plate24, and alever 204 is horizontally pivoted at 26:5 to said bracket. The lever 2114 has a` notch providingian abutment at 2&8 whichis engageable vwith the shoulder 198 of the block when the leveris in its lower position as shown inlFig. Il. The lever is biased'to its saicl'lower position by a spring andthe periphery of the ange 89 limits downward move.- ment. n 'v *I i iMQPDFed 011 the. 'bracket ,202 is.. a Splenad .2,12 having a veticallynmovable core or plunger 213.` A link" 2?;4 is pivotally connected at its upper end with the plunger 213 and Ais pivotally connected at its lower end with the lever 204., When the solenoid is energized, the plunger 213 is moved upwardly so asrto swing the lever Y294 upwardly in opposition to the spring y216. The solenoid normally holds the lever 2ii4rin its upper position so that the abutment 208 is out of the paths of movement of the blocks 90 and `92. When the solenoid is de-energized, the lever isV moved downwardly by the spring 210 to the extent permitted by the periphery of the ange 89, the abutment 208 being then in position to engage `the shoulder 198'of the block 90. As shown in Fig. l1 said abutment 208 is slightlyV spaced from said shoulder`198. The purpose and manner of operation of the last-,described mechanism will be hereinaftermore fully explained. Y

The spindle has been shown and described as initially rotatable in the clockwise direction to eect winding. However, the spindle Lmay be initially rotatable in the counterclockwise direction to eiectvwinding. When the spindle is to be initially rotated in the counterclockwise direction, the `lever 204 is reversed in position as shown in Fig. l2. rthe lever is provided with an additional abutment 215. When the lever 204 is reversed and is in its lower position the abutment 2115 is in position to engage theshoulder200 on the block 92.

The spindle 78 is provided with a positioning mechanism similar to that described for the spindle 76. This mechanism includes a solenoid 216 similar to the solenoid 212.

'Electrical control as shown in Fig. 13

Fig. l3 shows the various electrical connections for the machine shown in Figs. 3 to l2. It will be understood that Vsome Yof the electrical units may be mounted on a separate panel rather than on the main frame of the machine. Y'

- Main alternating current leads 218, 220 and 222 are provided which are controlled by a main switch 224.V The said main leads are connected with forward leads 226, 228and 230 for the motor 44 and said main leads are also connected with reverse leads 232, 234 and 236 for said motor. j

The primary coil of a transformer 238 is connected between the main leads 218 and 222. Connected with the secondary coil of the transformer are two leads 246 and 242 having a suitable relatively small potential between them which may be 110 volts. Connected withranother portion of the secondary coil of the transformer is a lead 244. The potential between the leads 246 and 244 is greater than that between the leads 246 and 242 and may be 2,20 volts. Y

` Included in a connection 246 between the leads 240 and 242 is the coil of a forward'motor starter relay 248 and an initially open manually operable forward starter switch 256e. Connected in parallel with the switch %a is a shunt 252. included in another connection 254 between the leads 240 and 242 is the coil of a reverse motor starter relay 256 and an initially open manually operable reverse starter switch 258e. Connected in parallel with the switch 253a is a shunt 260. included in the connection 254 is an initially closed switch 2503, this being mechanically yconnected to be opened when the forward starter switch 25hZL is closed.V included in the connection 246 is an initially closed switch 258i?, Vthis being mechanicallylconnected to beopened when the reverse starter switch 258a is closed. y v Y The forward motor leads are controlled by a switch 2481- and the reverse motor leads are controlled by a switch 256g. Included respectively in the shunts 252 and 261i are initially open switches 248B and 256D. included respectivelypin the, connections. 246 andmv254are initially closedswitches 256c and 248. The switches248?, 248i and 248c are Vmechanically connected with therforward relay 243 so that upon energization ofthe relaythe switches248'au and 248b are closed and the switch 248 isv opened. The switches 256e, 7256i and 256J are mechanicallyconnectednwith the reverse relay 256 so that upon energization of the relay the switches 256B and 256b are closed and the switch 256c is opened.

Upon manual closing of the forward starter switch 250 the forward relay 248 is energized and the switch 25010 is opened. The opening ofV the switch 250bprevents vany possible energization of the reverse relay 256. energization of the relay 248 closes the switch 24S-to startV the motor in the forward direction and closes the switch 24Sb to maintain the circuit through the coilV after the starter switch 256a is opened. At the same time the switch 243c is opened to prevent any possible cnergization of the reverse relay after .the switch 256b is closed.,

Upon manual closing of the reverscstarter switch V258a the reverse relayV 256 Yis energized and the switch 2581? is opened. The opening vof the switch 258b preventsA any possible energization of the forward relay 24S. The ener-V gization of the relay 256 closes the switch 256a to start the motorv in the reverse directionand closes the switch 256b to maintain the circuit through. the relay after the starter switch 2.58a is opened. At the same time the switch 256 is opened to prevent any possible energization of the forward relay after the switch 258bis closed.

An initially closed motor stop switch 262 is connected in series with the connections 246 and 254. The manual opening of the switch 262 serves to de-energize the relay that has been previously energized, thus restoring all of the other switches to their initial positions and'stopping the motor.

Included in a connection 264 between the'leads 240 and` 242 is the coil of a relay 266 for controlling the operationV of the left spindle 76. Also includedk in the connectionV 264 is an initially open starter switch '268 and an initiallyl closed stop switch 270. Connected in parallel with the switch 268 is a shunt 272. The switch 268 whenV closed energizes the relay 266 to start the operation of the left spindle and the switch 270 when opened de-energizes the relay 266 to stop the operation of the left'spindle, all as hereinafter more fully explained. rl`he switches 268 and 270 are enclosed within a switch box 274 mounted on the machine 'at the left end thereofiasshown in Figs. Y3 and-4.-

Y with the relayenergized. t

Included in a connection 276 between the leads 240 and 242 is the coil of a relay' 278 for controlling the operation of the right spindle 78. Also included in the connection 276 is an initially open starter switch 280 and an initially closed stop switch 282. Connected in parallel with the switch 28) is a shunt 283. The switch 28() when Vclosed energizes the relay 278 to start the operation of the right spindle and the switch 282 when opened deenergizes the relay 27S to stop the operation of the right spindle, all as hereinafter more -fully explained. They switches 280 and 282'are enclosed within arswitch` box 284 mounted -on the machine at the right end thereof as shownin Figs. 3 and 4. Y f

Mechanically connected with the relay 278 for operation thereby are switches 278e, 278b and 278. The switches 2788L and 278b are closed when therelayY is energized and are open when the relay is, de-energized.

The switch 27%c is open when the relayl is'energized and The vthe connection 312 except for the switch 1921. Aconnection 316 includes a resistance 318`and the coil of is closed when the relay is de-'energized The switch 278a is included in the shunt 283 to maintain the circuit through the relay after the switch 22T-i) has been opened. The several switches are shown in the positions which they occupy with the relay energized.

By means of a connection 286 and return connections 288 and 299, the'solenoids 212 and 216 are connected with the main leads 213, 225i and 222.A The' cam oper ated switch 176 is included in the connection 288 for energizing and deenergizing both solenoids. When the switch 176 is open, as shown in Fig."l3, the solenoids are de-energized andthe levers Y204'controlled by said solenoids are in their lower positions as shown in Figs. 4 and l'l.V Preferably amanually operable switch 292 is provided in parallel with the switch 176. When the switch 292 is closed the solenoids are continuously energized. However, the switch 292 is ordinarily open and does not interfere with lthe controlof vthe solenoids by the switch 176. Y .v

Connected betweentthe leads 2.49 and 244 is a4 rectiier 294`from which extend leads 296 and 298. The said leads 296 and 298 are supplied with direct current at a potential which may be 220 volts.

TheA electrical connections and apparatus which are controlled by the relay 266 and which serve primarily to control the left spindle 76 will irst bedescribed.

'The'magnet coilV of the clutch 126 for the left spindle 76 i s included in a main connectionti between the'leads 296 and 293. Also included in the connection 300 is the switch 2661, the cam' operated switch 172, a hot wire resistance3j2 which may be a lamp bulb, and the cam operated ratchet switch 1702. AV condenser 304 is connected in parallel with the clutch magnet coil. A manually operable switch 305a is connected in parallel with the switch contacts 170 and for present purposes it will be Vassumed that the switch 305e is closed.

A shunt connection 3 06 for the magnet coil of the clutch 120 is provided in parallel with the main clutch connection 390, this shunt connection including the cam operated switch 1721, the cam operated switch 192B, a xed resistance 308 and a variable resistancel. The switch 1721 is hereinafter sometimes designated as a control switch, and the switch 1925 is hereinafter sometimes designated as a first stop switch.

A connection 312 extends between a point in the clutch shunt connection' 306 intermediatethe switches 1721 and 192" and the lead 298. This connection includes the cam operated switch 1921 and the magnet coil of the brake 136 for the left spindle. A condenser 314 is connected in parallel with the brake magnet' coil 140. The switch 1921 is hereinafter sometimes designated as a second stop switch. It will be observed that the first and second stop switches 1921 and 1921 are in parallel with each other and in series with the control switch 1721.

A connection 316 is provided which is in parallel with The a time delay relay 320. An initially closed vswitch 320a is provided in the connection 312, this switch being operable by the relay 320. The relay 320 upon energization serves to open the switch 320a after a predetermined small interval of time which may be about .4 of a second.

A connection 322 is provided in parallel with the switch 326e, this connection including a fixed resistance 324 and a variable resistance 326.

A connection 32S is provided between the lead 296 and the connection 322, this connection including the switch 266 and an initially closed manually operable release switch 330. The switch 330 is in said switch box 274.

The electrical connections and apparatus which are controlled by the relay 278 and serve primarily to control the right spindle 7S are similar to those for theY left spindle 76 and they will now be described.

The magnet coil of the clutch 146 for the right spindle 78is included in a connection 332 between the leads 296 and 298. Also included in the connection 332 is the switch 2781, the cam operated switch 1748, a hot wire resistance 334 which may be a lamp bulb, and thecam operated ratchet switch 1701. A condenser 336 is con nected in parallel with the clutch magnet coil. A manuallyoperable switch 3051 is 4connected in parallel with the switch 1701. The switch 3951 will be assumed to be closed, this switch being mechanically connected with the switch 305B so that both switches are opened and closed in unison.

A' connection 338 is provided in parallel with the switch 174 and the resistance 334, this connection including thecam operated switch 1741?, the cam operated switch 1941,' a lixed resistance 34% and a variable resistance342.

A connection 344 extends between a point in the connection 338 intermediate the switches 1741 and 19219' and the lead 293. This connection includes the cam operated switch 1941 and the magnet coil of the brake for the right spindle. A condenser 346 is connected in parallel with the brake magnet coil.

A connection 343 is provided which is in parallel with the connection 344 except for the switch 1941. The connection 343 includes a resistance 350 and the coil of a time delay relay 352. An initially closed switch 3521a1 is provided in the connection 3&4, this switch being operable by the relay 352. The relay 352 upon energization serves toopen the switch 352a after a predetermined small interval of time which may be about .4 of a second.

A Vconnection 354 is provided in parallel with the switch352, this connection including a xed resistance 356 and a variable resistance 35d. i

A connection 36) is provided between the lead 296 and the connection 354, this connection including the switch 2731 and an initially closed manually operable release switch 362. rl`he switch 362 is in said switch box 254.

Operation of machine v The machine requires two operators when springs are to be wound at both spindles. One operator stands at the left end of the machine so that he can conveniently remove the successive completed springs from the arbor carried by the left spindle 76 and so that he can put in place successive new wires 19. The other operator stands at the right end Vof the machine so that he can conveniently remove the successively completed springs from the arbor carried by the right spindle 78 and so that he can put in place successive new wires 10. The operator at the left can control his own spindle by means of the switches 263, 27d and 330 in the switch box 274. The operator at the iight can control his own spindle by means of the switches 2%0, 282 and 32 in the switch box 284.

The bull gear 5d and the segment 6b together with various parts operated thereby constitute power operated -means having successive cycles of operation. The clutch and brake for each spindle together with the electrical circuits and switches therefor constitute a control means for the spindle operable by said power operated means.

The machine can be operated so that a spring is wound by each spindle during each cycle of the power operated means. Alternatively the machine can be operated so that a spring is wound by each spindle during each alternate cycle, the timing preferably being such that one spindle is idle while the other is operating. The first mentioned manner of operation will be first described. For this manner of operation the switches 395 and 3851 are closed.

ln describing the operation of the machine it will be assumed that the left spindle is rotated in the clockwise direction to eiect winding, the dog 16 being positioned as shown in Fig. 4 with its hook facing in the clockwise direction. Similarly, it will be assumed that the right spindle 78 is rotated in the counterclockwise direction, as viewed in Fig. 4. However, as viewed by the operator, the spindle 78 is rotated in the clockwise direction, the

.manner of .operation beingV exactly .the same as that ,-of Y fthe spindle :76. -Itwill also be assumed that thelswitches' "2'68Yan'd 23lhave'be'en closed 'so that bot'hlspindles'are ready 'for' operation. Y

'It will also be assumed that one cycle has .been complated and that two'wires have been coiled or wound at the respective .spindles `to the shape shownin Fig. 2.

:Each operator hasrreinov'ed the dog from the/arbor, the

Wound spring being removed with the dog. ,The-.spring has .beense'par'atedfrom the dog and a new wire 1`0has Vbeen engaged withV the 'dog and the dog has been re-en- Y Y gaged with the arbor,jas shown in Figs. 1,-3 and 2l. `At the option of the operator the'wire 1d may be'engaged 'with the dogei'ther'berore or 'afterthe dog is re-'engaged `With'the arbor. "In order Vtofacilitateplacement'of'the Vwire and the dog,"the spindle is initially positioned so "that theldog is located substantially as shown in Fig. V4, "the legs'12 of'thewire l'ldbeing spaced downwardly 4from "the `stud 20. "It will 'be Vseen that before winding's'tarts the spindle'a'ndthe dog'rnus't be rotated su'ciently'toen- Ygage the legs d2 with 'thestud This amount of initial rotation will be assumed to'be '1/10 of aturn.

"In setting up the machine the rollerl has been'so adjusted'and the 'gears 19%, '11d and H5, H8 havebe'enso Yselected that each Vspindle makes the .required numberof Vrevolutions .or turns during the movement of 'the Vgear 'segment Vin 'one direction, Vthat is, .fromV left vto right.

ither'leftspin'dle V76 and'to the Vparts directly associated therewith, it being understood that the manner of Yoperation for the spindle '7S is 'the same. At the beginning of winding, the several parts are in the positions shown in Figs. 4 and 14, and the-several switches are in the 'positions shown in Fig. 1'3. The switches 717221 and 172b have been respectively closed and opened by the cam A162. By means of `the closed switch iZa a circuithas been established through the magnet coil of the clutch 124). This circuit extends through the switch 305a which has lbeen assumed to be closed. The clutch 'connects vthe spindle 76 with the. drive shaft 'd2 and the 'spindle is therefore rotated. The open control switch'lZb insures -the opening or breaking of `the circuit through the-magnet coil of the brakejta, the brake being disengaged to .permitfspindlerotation. At the start of spindle rotation in the winding or clockwise direction the Vabutmer'ittl on the leverZd-/ is in engagement With'the shoulder V198 of the block S36, the .starting position ofthe spindle being Vthus accurately determined as shown in Fig, 4 and the spindle being .free to rotate in the clockwise orhwinding direction. immediately after the start ofispindle rotation, the cam 16e-acts toclose theswitch V17( and thus Y energize the solenoid 2?. and upwardly move'th'e plunger thereof so that the lever-12%@ is swung to its upper position'with its abutment 2d? out of the Apaths'of the vblocks 99 on the spindle. During winding kthe gear seg- .rnentd moves from its extreme letposi-tion shown at 60a in Figsftandlf to the extreme right `position shown at dtlb in Figs. 4 and l5. The clutch is maintained engaged and Ythe 'brake is "maintained disengaged so as'to continue the rotation of the spindle during the lentire ent of the segment.Y rl`he said Vmovement ofthe gear segment rotates the spindle to the required=eittent, Vwhich for jtherexample 'givenis 513;@ turns.

When thepartsreach positions shoWningEig/.Qli

the :gear vsegment V6) :starts .its ,returnzmovenient toward lthe left. The clutch fisstill Vengaged and the ,brake gis still disengaged, and the directionrofrotation ofthe drive shaft and spindle is reversed. .Duringthe intial-portion or" the reverse rotation the spring unwinds to .a limited extent, but the unwinding is at a'relatively slow ratejas determined vby the relatively Vslowreverse rotationof the spindle. This prevents any unduly. rapid unwindirig.V 'Ihe extent of unwinding is vordinarily less than a complete turn and in therexamplefg'iven'itis 1A ofaturn. Y Y

When the partsfreachthe,.positions shownin Fig. V16, the unwindingzo'the spring fhaspreferably Vbeen com- Qpl'eted, .orvsubstantially completed. .If theunwinding'rhas lheen eiactly completed,'the dog vis spaced from the starting position by the angle b,.which is @'16 ofra turn. .Theref upon .the switch 172ais openedl .by the .cam`152r and `the switch/172b is simultaneously closed. Y The closingofthe switch Y1'72J `'establishes an Valternate Vor shunt circuit through the magnet-coilof the clutch 121), rthisalternate Ycircuit including theziirst .stop .switch 192b `whichgisjstill .closed and alsoincludes the resistances .30S -and l315). By means of theV las-t described circuit a reduced Noltage Vis applied vto the clutch magnetcoil 126. .The clutch Y.continues to rotate the spindle in thereverse .direction but with smaller current,V the .clutch vbeing ltliusprepared Y Vfor'rapid disengagementof the :spindle when thecircuit is klater broken. Y Y

The clutch operating with reduced current. continues Vto rotate .thespindlejn ,the reverse direction :to an extent wlrich'issuicient to restore the .spindle anddog approxivmately,:brit-preferably not .quiteyto theiriinitialstarting vpositions, asshOWn in'Fig. 17. The :smallcspacingfrom the starting positionis represented bythe :angle c. 'if-"his additional .reverset'rotationis shown Vas vbeing -a .little more than 1A: of aturn, audit isin any event lessrthantacom- .plete-turn. .The V-said additional reverse rotation-.serves lthe stud 20 'so .that .thespringcan -be readily removed. When the parts reach thepositions showninlig. V17, the iirst stop switch 192el Vis opened by the cam 18S-onine spindle 76 and Vthe :second .stop switch 1921?issimultane- Yously closed.

V192n and 192b are operated during each turn of ythe spindle in the windingdirectiom and during 'a partial .turn `inthe unwinding direction but that no :circuits arebroken or maderthereby while the control switchi172b remains open. The iirst opening of the first stop aswitch '1522*1 after the control switch Y172b has been closed breaks the alternate` or shuntcircui-t through'the magnet vcoil'of the clutch 124? to disengage the clutch and "the vsimultaneous closing of the -second-stop switch1192bfestablishesa cir- -cuit through Ithe vmagnet-coil oflthe brake :andvalso establishes Va circuitthrough the coil `of the'relay 520. Full lvoltage is initiallyapplied tothe brakcma'gnetfcoil Vand the b'rakefacts to substantially instantaneously stop .the rotation of 'the-spindle. The `relay 32) after a predetermined time lag, which may be .4 of 'a'secorrdf acts to open the switch32a; 'This cuts out the direct `connection tothe brake magnet-coil, saidcoilbeingthen ener- .gizedthreugh theresistances 32'4 and 526. By reason of said resistances areduce'd voltage is applied kto the Vbrake magnetcl, but the voltageis sufficient to errableV the 'brake -to `hold the Vspindle against rotation. .inas-V VIt will be observedfthat the Vstop-switches 13 theoperating earnl 1881 therefor. This second controlmeans` is dependent for its-operation--uponY the prior movement of the movable element or cam 162 of the first control means to its switch operation position andy upon the-prior operation of the said control switches 172e' and 1721. After the spindle has rotated through anadditional predetermined fractie-n of aturn, the secondy controll means serves to substantially simultaneously disengage the clutch and engage the brake to-stop the spindle.

It will. also be observed that the circuit for the clutch*- :includes t-woparallel connections 366 and `3115. The switch 172a is -an initially closed switch in the main clutch connection 3081 The switch 172b is an initially open control switch in the shunt connection: 306 for the clutchy and in the circuit connection 312 for the brake. The cam 162 constitutes means operable in; timed relation Withthe spindle for opening the main clutch switch 172a and for`- closing said control switch 172D after-the-spindle Has-rotated to a predetermined substantial extent;v The switchz 1-92EL is a normally closed rststop switch inthe clutchv shunt connection 366, and the switch 192b is` a normally openl second stopV switch in thebrake connection 312. The spindle cam 188 constitutes means for simultaneously operating the stop switches to open one o t' them and to c lose the other during each spindle rotation, the tirst stop switchv 192a when irst opened after the opening-of the main clutch switch 1-72 and the closing ofthe control switch 172b serving4 lto open the circuit through-the-clutch and the second stop-switch 192b-when rst closed after they closing ofthe control switch 172b serving to close'the circuit through the brake.

The last preceding description relates more particular-ly to 'thespindle 76 and the parts associated therewith. It will be understood however that the switches 174e, 174h and 194%, 194h operate simultaneously with the switches 172,, 1721 and 1928, 192b tocontrol the spindle 78 inthe-samernanner asl described for the spindle 76.

At or about the same time that' the switches 192B, 192b and 194B, 194b are operated to stop the spindles, the switch 176 is openedby the cam 166 to de-energizeV the solenoids 212 and 216. When the solenoids are deenergized' the lever-204 for each-spindle is movedY down- Wardlyv to the position shown 4in Fig. l1, the abutment 268y (mythe-lever beingjadjacentV the shoulder 1980i theblock 90. Each spindle is stopped in-sucha position thatthere isV a.' slight space betweenV the abutmentV 208 andl the shoulder 19,3` as shown in4 Fig. l1.

After the parts have reached thev positions shown in Fig. 17; the gear segment l'continues-to movetoward the left, the spindles being heldfby thebrakes and'being stationary. During this period of spindle dwell the operators remove the completed springs and replace'them with wires ^as previously described.

Near'the` endl ofthe reverse rotation of theV drive shaft or nearthe beginning of'the rotation thereof-in the winding direction, the switches 172b and 174b are simultaneously` opened by` their respective cams and at the same time' the switches 17,2a and 174.2 are simultaneously closed. Preferably the switches are operated with the parts in .the position shown in Fig. 18. In this position theA gear segment 60 h asmoved nearly, but not quite, to its extreme left position as shown in Figs. 4 and 14 and thedrive; shafthas nearly, but notquite, completed its reverse rotation; The positions of the spindle and dog are the same as shown in Fig..17'. The Fig. 1S position is reachedafter the aforesaid-period of spindle dwell and the completed springs have been-replaced by new wires 10. As the-resultof the-described operation of the switches the,l circuitsthrough the magnet coils of the brakes 1436 and 1S0.are broken and the circuits through the magnet coilsnof the. clutches 120 and 146 are closed. By reason of the hot wire resistances 362 and 334 the'clutchj magnet coils have aninitial high voltage to quickly start'the rotation of` the spindles. After the resistances-'302 and 121 334 have becomeheated a reduced voltage is; appliedtci` the coils;

InasmuchV as the parts are in' the positions shown in Fig. 18- when the clutchesy are irstengaged, the spindles' are initially moved slightly in the reverse directions. Referring particularly to the spindle 76, it will be seen from Fig. ll that the: spindle is'initially moved in the counterclockwise direction4 to engage the shoulder 198V of the block' 90 with the abutmenti 208 of the lever 204. The

engagement of'said parts takes place when the segment' has-moved to its extreme left'position, the several parts being in the positionsv shown in' Figs. 4 and 14. Ordinarily there is asmall slippage-at the clutch as said'parts engage; The said engagement accurately'locates the` spindle in its required` starting position. The final locating of the spindles in their' proper startingy positions is irn-Y portant', as stopping of the spindles by the brakes is unavoidably subject to minor inaccuracies. If thev linal locatingv means were noty provided, any errors in the spindle'posit-ions as determined; bythe brakes would accumulate through successive cycles andthe startingl positions would soon be substantiallyditerent from theV proper starting positions, thus resulting in the winding of the4 springs Vto extents substantially greater or less than re quired.-

Immediatelyafterthe segment startstomove toward` the right: to star-tl the movement of the spindles in the windingV directions, the-switch 176 is closed by the cam'v 166 to energize the solenoids 212Vv and 216- andto thus dle in the winding direction and during the initial reverse rotation thereof. The said automatic meansiserves to cause the shoulder to move-toits operative position duringthe final reverse movement of'the spindle to its starting position;

It will be observed that the bull gear 50 andthe roller- 70 are rotated-in; the counterclockwise direction, asl

viewed in Fig. 4 and? in Figs. 14 and' 18. They move through less than 1/2 of a turnv while the segment 60 moves toward the rightto effect winding. They move throughmore th'anll/z of a turnwhile the segmentmoves toward the left. This gives the maximum dwell-between theFig. 17 position and the Fig. 18 positionto enable;

the operators to'removethe completed springs and put newA wires in-place.

Itwill be seenthat each operator always has complete control ofhis own-spindle; Referring'particularlyto the left: spindle 76,l it will be observedthat the operation of the spindle canbe startedby the switch 268 and stoppedY by the switch 271i.' The stopping or" one spindle does not in'any way interfere Awith-thegcontinued operation of the other spindle. Infact; when only limited production is requiredor when only one' operator is available, onespndleV can'remain entirely idle.

ln the-eventofj-an emergency during winding, the operator canv immediately stop his` ownY spindlev by opening thecorresponding stop-switch; suchLas 270;' The .opening of the switchl 270` de-energizes the relay'266, thus'. opening the switch 266b and closingthe. switch 2665 The opening of then switch' 266V breaks the circuit through the magnet coil of thefclutch 12` and the closing ofthe switch 266c establish'esa circuit through the magnet coil of thel brake 136, thus practically` instantaneously stopping rotation ofthe spindle.

Ordinarily, winding isv interrupted only when some emergency is encountered, as for instance when the-operatorobserves that' th'e spring" is not'bei'ngproperly wound. with the spindle stopped and withl an incomplete, spring on the arbor., it'isY necessary to release the brake .in order. thattthe'spindle maybe rotated toV permit removal'ofthe. incomplete spring. This is done byYV opening the switch 2:30y tn temporarily. break the lcircuit through the brake magnet coil. After the incomplete spring has been removed, the switch 330 is closed andthe switch 268 is again closed to start the cycle of operations of thespindle.

As thus far described, it has been assumed that the switches 305a and 305b are closed. When said switches are closed the control means for each spindle is operative during each cycle of operation of the power operated means. Under some conditions, however, it is impracticable for the operator to remove thecompleted spring and put a new wire 1t) in place during the relatively short interval of time while the gear segment is moving from the Fig. 17 position vto the Fig. `18 position. Under such conditions the switches 305a and 305b are opened, thus causing the control means for each spindle to be alternately operative and inoperative duringV successive cycles of. operation of the power operated means. As has been stated, the switches 170il and 170b are of the ratchet type. Upon one actuation the switch 170a is open and the switch 170b is closed.v Upon the next actuation the switch 170a is closed and the switch 170b is open. i e

Referring particularlyV to the spindle 76, it will be seen that with the vswitch 170a open during one'cycle no circuit is established-throughthe-magnet coil of the clutch 120, the spindle therefore remaining idle. It will similarlybe seen that-with the switch '170'n open during the next following cycle no circuit is established through the magnet'coil of the clutch 146, thespindle 78- therefore remaining idle. When the machine is operated as last above-described, the left spindle Ais stopped with the parts in the Fig. 17 position and it remains stationary `until the parts reach the Fig. 18 position of the next following cycle. The right spindle is similarly stopped` with the parts in the Fig. 18 position of the cycle following that in which the left spindle is so stopped.

The said switches 305a and 305b are optionally operable eitherrto their closed positions or to their open positions. With said switches in closed positions, the control means for each spindle is operative during each successive cycle of operation of theY power operated means. With said switches in open positions, the control means for each spindle is alternately operative and inoperative during successive cycles of operation of the power operated means. Y Y Y in the foregoing-description, it has been assumed that each spindle during winding is operated in the clockwise direction as viewed by the operator. To elect winding in the counterclockwise direction, the direction of rotation of the motor 44 is reversed so that the bull gear 50 is rotated in the clockwise direction instead of in the counterclockwise direction. Each le-ver 204 is reversed in position so as to be located as shown in Fig. l2 with the shoulder 215 eng-ageable with the face 200 of the block 92; Each dog 16, or an alternative similar dog, is positioned with its hook facing in the counterclockwise direction. Each wire i is engaged with its dog with the Vlegs 12, 12 positioned below lthe spindle instead of above it. Each stud 20 is so positioned that the legs 12, 12 of the wire are above the stud instead of below it. Except as abovestated, the manner of operation is similar to that previously described, but all of the relative movements of the parts as illustrated -in Figs. 14 to 18 are reversed.

The invention claimed is:

l. A spring winding machine comprising in combination, a spindle rotatable in a winding direction lfrom a predetermined starting position -and then reveresly, means connected withtthe spindle for rotation therewith and constructed for engaging a wire to be wound, means-including a shoulderrotatable with-the' spindle and a cooperating abutment for stopping reverse rotation of the spindleV when it reaches its said starting position, a gear segment oscillated through a predetermined angle, a drive shaft connected with the segment for rotation thereby first in one direction yandjthen reversely during each segment oscillation, a clutch serving when engaged to connect the '14.5 spindle with the drive shaft for rotation therewithfa brake serving whenengaged to stop the spindle, automatically.

. operable means for disengaging the brake and simultane-Y ously engaging the clutch near lthe end of eachsuccessive reverse rotative movement of the drive so as torotate the'l spindle vreversely 4of its winding direction Vto itssaid starting position as determined by said shoulder and abutment which last said means serves to maintain the clutch engaged and the brake disengaged while the drive -shaft is rotating in the first said` direction to 'rotate the yspindle in the ywinding direction and to thus eect Windingof `the wire to form a spring and which last'said means fur-ther serves to maintain the clutch engaged and the brake disiengaged until after the neX-t following reverse rotative movement of the drive shaft has started, means operable,

in conjunction with said shoulder and abutment for mo'vn ing one of them relatively to the other to prevent interengagement thereof dur-ing rotation Vof'thespindle in Ythe winding direction andY during the initial reverse rotation thereof, and means automatically-operable during-[each lastsaid reverse rotative movement'of the drive shaft for disengaging the-clutch and simultaneously engaging the brake to stop theY spindle during continued movement `of the segment Vand continued rotation of the drive shaft and for thus interrupting the reverse rotation of the vspindle tovprovide a period of dwell during which the spindle is stationary, and means `for causing the 'said interrupting means to act so as to provide the said period of dwell after an initial reverse rotation of the spindle and prior to a final reverse rotation thereof so that said iinal reverse rotation is stopped at said starting position independently Yof the clutch and as determined by said shoulder and abutment.

2. A spring winding machine comprisingv in combination, a spindle rotatable in a 4winding* direction-froma predetermined starting position Aand then reveresly, means connected with the spindle for rotation therewith and constructed for engaging a -wire to be wound,means including a shoulder rotatable with the spindle-and -acooperating abutment for Vstopping reverse rotation of the spindle when it reaches its said star-ting position, a geary segment oscillatedthrough a predetermined angle, a drive shaft connected with `the segment for rotation thereby rst in the winding direction and then reversely during each segment oscillation, 'an electromagnetic clutch serving when engaged to connect the spindle with the-drive shaft for rotation therewith, `an electromagnetic brake serving when engaged to stop the spindley'means including electrical circuits and switches and automatically operable for disengaging the brake and simultaneously engaging the clntch near the end of each successive reverse rotative movement of the drive shaft to initially rotate the spindlereversely to its said starting position as determined by said shoulder and Iabutment which last said meansV serves to maintain the clutch engaged and the brake disengaged while the drive shaft is rotating inthe iirst said direction to rotate the spindle lin the winding direction and to thus eiect wind- -ing of the wire to forma spring and 'which last said means further serves to maintain-the clutchy engaged and the brake disengaged until afterthe neX-t following reverse rotative movement of the drive shaft has started, and means lincluding electrical circuits and switches Vand automatically operable Vduring each last said reverse rotative movement of the drive sha-ft for disengaging the clutch and simultaneously engaging the brake to stop the spindle' t during continued movement ofthe segment and continued rotation of the drive shaft and for thus interrupting the reverse rotation of the spindleV to provide a period of dwell dur-ing' which the spindle is stationary, and jmeansfor causing said interrupting means to act so asv toprovide said period of dwell after an initial Vreverserotation of the spindle and prior to a tinal reverse rotation thereof so thatv said nal reverse rotation -is stoppedy at said starting position independently of the clutch Iand as determined by said shoulder and abutment. f t v 3. spring vwinding machine comprising in Ycombina-'7;

tion, a spindle having two alternative predetermined starting positions one corresponding to rotation in one winding direction and the other corresponding to rotation in the opposite Winding direction, means connected with the spindle for rotation therewith and constructed for engaging a wire to be wound, means including a pair of alternatively useable shoulders rotatable with the spindle and a pair of alternatively useable abutments cooperating respectively with said shoulders for stopping reverse rotation of the spindle in one or the other of its respectively corresponding starting positions, a gear segment osciiiated through a predetermined angle, a drive shaft connected with the segment for rotation thereby iirst in one direction and then reversely during each segment oscillation, means including a clutch interposed between said drive shaft and said spinde for eiecting rotation of the spindle in either winding direction from its corresponding starting position to effect winding of the wire to form a spring and for then electing rotation of the spindle in the direction reverse of the selected winding direction to its said corresponding starting position, means operable in conjunction with said pairs of shoulders and said pairs of abutments for moving one of said pairs relatively to the other to prevent interengagement of said shoulders and abutments during rotation of the spindle in either winding direction and during the initial rotation of the spindle in the corresponding reverse direction, and means for interrupting the action of the clutch and for thus interrupting the reverse rotation of the spindle in the last said direction during continued rotation of the drive shaft so as to provide a period of dwell during which the spindle is stationary, and means for causing said interrupting means to act so as to provide said period of dwell after an initial reverse rotation of the spindle and prior to a iinal reverse rotation thereof so that said final reverse rotation is stopped at said starting position independently of the clutch and as determined by the shoulder and abutment corresponding to the last said direction of reverse rotation.

4. A spring winding machine comprising in combination, two rotatable spindles having predetermined starting positions, two means connected respectively with the spindles for rotation therewith and constructed respectively to engage wires to be wound, two drive shafts, a single .power means connected with the drive shafts for rotating them successively and in unison to predetermined extents in winding directions and then to the same extents in reverse directions, two electromagnetic clutches each serving when engaged to connect one spindle with the corresponding drive shaft for rotation therewith, two electromagnetic brakes each serving when engaged to stop one spindle, a single cam means connected with the power means for the drive shafts and rotatable through one revolution during each cycle of winding and reverse rotations of said drive shafts, two means each including electrical circuits and including switches operable by said single cam means and each constructed and arranged to serve upon operation of its said switches for disengaging the corresponding brake and simultaneously engaging the corresponding clutch near the beginning of each rotation of the corresponding drive shaft in the winding direction to start rotation of the corresponding spindle in the winding direction from its said starting position to effect winding of the corresponding Wires to form a spring, each of the last said means being also constructed and arranged to maintain the corresponding clutch engaged and the corresponding brake disengaged until after the next following reverse rotations of the corresponding drive shaft has started, two cams each rotatable in unison with the rotation of a corresponding spindle in the winding and reverse directions, and two means each including electrical circuits and including switches operable by a corresponding cam during each reverse rotation of the corresponding spindle or disengaging the corresponding clutch and simultaneously engaging the corresponding brake to stop the corresponding spindle at least approximately in its said starting position.

References Cited in the tile of this patent UNITED STATES PATENTS 592,462 Wirth Oct. 26, 1897 760,100 Bultzingslowen May 17, 1904 1,368,297 Sleeper Feb. 15, 1921 1,579,247 Rohlng Apr. 6, 1926 1,673,185 DesCombes June 12, 1928 1,702,475 Jahnig Feb. 19, 1929 1,771,927 Illingworth July 29, 1930 1,862,267 Honig June 7, 1932 1,884,184 Pearson Oct. 25, 1932 2,030,988 Hofstetter Feb. 18, 1936 2,079,837 Buckley May 1l, 1937 2,120,146 Halvorsen June 7, 1938 2,179,296 iden Nov. 7, 1939 2,259,882 Glasner Oct. 2l, 1941 2,308,709 Newman 1an. 13, 1943 2,317,290 Mcllvried Apr. 20, 1943 2,352,183 Bullard `iune 27, 1944 2,373,427 Stickney Apr. 10, 1945 2,513,916 Carlson July 4, 1950 FOREIGN PATENTS 260,205 Great Britain Oct. 28, 1926 

